121220123442 has 48 divisors (see below), whose sum is σ = 269122525056. Its totient is φ = 36369652000.

The previous prime is 121220123419. The next prime is 121220123489. The reversal of 121220123442 is 244321022121.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 753258 + ... + 899909.

It is an arithmetic number, because the mean of its divisors is an integer number (5606719272).

Almost surely, 2^121220123442 is an apocalyptic number.

121220123442 is an abundant number, since it is smaller than the sum of its proper divisors (147902401614).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121220123442 is a wasteful number, since it uses less digits than its factorization.

121220123442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1653295 (or 1653284 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 121220123442 its reverse (244321022121), we get a palindrome (365541145563).

The spelling of 121220123442 in words is "one hundred twenty-one billion, two hundred twenty million, one hundred twenty-three thousand, four hundred forty-two".